These killable dog characters make me wonder: Did they have to watch "reference" videos of dogs being killed? That would be so fucked up if someone had to actually watch videos of real dogs being tortured and killed.
I see some people saying on reddit that no one should be upset about being able to kill dogs in the game, because other games have done this before too. I disagree with that, because I'm betting that the dogs dying in this game will be far worse than what any other game has done when it comes to killing animals.
Given what we know about this game so far, Druckmann has gone out of his way to make it as violent as possible. With that in mind, Ellie won't just shoot the dogs and then they'll quickly die. No, Druckmann probably made it to where we will have to beat the shit out of the dog, and we'll hear every pained whimper, cry, and yelp. We'll see every pained expression and get to watch the poor dog writhe in agony as it slowly succumbs to its injuries. At that point, the owner will come out, cry it's name and demonize Ellie.
I think you are spot on, which is why I am certain that these dog's deaths will be extremely graphic and absolutely brutal.